1. Three-level indoor environment comfort display 2. Indoor temperature display; test range: 0℃-70℃, 32°F-158°F, detection cycle: 10 seconds, when it is not within the temperature detection range, it display LL.L below the temperature range (and display at a flashing frequency of 0.5Hz), and display .H above the temperature range (and display at a flashing frequency of 0.5Hz) 3. Indoor humidity, detection range: 20%-99%, detection cycle: 10 seconds, when it is not within the humidity detection range, it display LL below the humidity detection range (and display at a flashing frequency of 0.5Hz), and display above the humidity detection range (and display at a flashing frequency of 0.5Hz) 4. Indoor temperature and humidity change trend indication 5. Indoor temperature and humidity maximum/minimum values are displayed on the same screen Indoor temperature and humidity memory function button selection function Indoor temperature and humidity upper and lower value over-limit alarm function Temperature unit can be switched to display: ° C/° F, default display unit: temperature [℃] Record the maximum/minimum temperature and humidity in all time periods or within 24 hours. Battery-powered low-battery reminder function There is a magnet on the back of the product for magnetic and a support frame for placement Screen size: 3 inches (The product appearance and printed words depending on the batch, but this does not affect use) Colour:Black Material:ABS Package Contents: 1 x Temperature and humidity monitor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.